Is there a need for improved public and worker safety for petroleum refineries?

A series of incidents at petroleum refineries in the US and subsequent investigations by the United States Chemical Safety Board resulted in a review by the state of California of risks to worker and public safety from petroleum refineries.

There are six petroleum refineries in Ontario: four in the Sarnia area, one in Nanticoke and a smaller one in Mississauga. Should a similar review of worker and public safety be conducted for Ontario petroleum refineries?